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Recent Accounting Pronouncements (Narrative) (Details)
 9 Months Ended
Sep. 30, 2020
ASU 2018-15 [Member]  
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]  
Change in accounting principle, accounting standards update, adopted true
Change in accounting principle, accounting standards update, adoption date Jan. 01, 2020
Change in accounting principle, accounting standards update, immaterial effect true
Change in accounting principle, accounting standards update, transition option elected us-gaap:AccountingStandardsUpdate201815ProspectiveMember
ASU 2018-14 [Member]  
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]  
Change in accounting principle, accounting standards update, adopted true
Change in accounting principle, accounting standards update, adoption date Jan. 01, 2020
Change in accounting principle, accounting standards update, immaterial effect true
ASU 2018-13 [Member]  
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]  
Change in accounting principle, accounting standards update, adopted true
Change in accounting principle, accounting standards update, adoption date Jan. 01, 2020
Change in accounting principle, accounting standards update, immaterial effect true